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1.发明授权Magnetic recording medium having a magnetic layer with a Tg of 80.degree. C . .degree. C. 失效具有Tg为80℃至100℃的磁性层的磁记录介质
公开(公告)号：US5419943A
公开(公告)日：1995-05-30
申请号：US144317
申请日：1993-11-01
CPC分类号： G11B5/7305 , G11B5/70 , G11B5/7021 , G11B5/78 , Y10S428/90 , Y10T428/24355 , Y10T428/249986 , Y10T428/25 , Y10T428/256 , Y10T428/265
摘要： A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer, said magnetic layer comprising ferromagnetic particles and a binder, wherein nonmagnetic support has a transverse-direction Young's modulus of at least 1,000 Kg/mm.sup.2, said magnetic layer has a glass transition temperature of 80.degree. to 100.degree. C., and said magnetic recording medium has a total thickness of less than 12 .mu.m, and further a magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer, said magnetic layer comprising ferromagnetic particles and a binder, wherein said magnetic recording medium is adapted for use with a magnetic head having a core width of at least 100 .mu.m at a speed of at least 20 m/sec based upon relative speed of said recording medium and said head, said nonmagnetic support has a transverse-direction Young's modulus of at least 1,000 Kg/mm.sup.2, said magnetic layer has a glass transition temperature of from 80.degree. to 100.degree. C., and said magnetic recording medium has a total thickness of less than 12 .mu.m.
摘要翻译： 公开了一种磁记录介质，其包括其上具有磁性层的非磁性载体，所述磁性层包含铁磁颗粒和粘合剂，其中非磁性载体的横向杨氏模量为至少1,000Kg / mm 2，所述磁性层具有 玻璃化转变温度为80℃至100℃，所述磁记录介质的总厚度小于12μm，并且还公开了一种磁记录介质，其包括其上具有磁性层的非磁性载体，所述磁性层 包括铁磁颗粒和粘合剂，其中所述磁记录介质适用于基于所述记录介质的相对速度，以至少20m / sec的速度具有至少100μm的芯宽的磁头，并且所述磁性介质 头部，所述非磁性载体的横向杨氏模量为至少1,000Kg / mm 2，所述磁性层的玻璃化转变温度为80° DEG至100℃，所述磁记录介质的总厚度小于12μm。
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公开(公告)号：US20060289335A1
公开(公告)日：2006-12-28
申请号：US11453978
申请日：2006-06-16
申请人： Yutaka Kakuishi , Katsumi Ryoke , Katsuhiko Meguro
发明人： Yutaka Kakuishi , Katsumi Ryoke , Katsuhiko Meguro
IPC分类号： B65D79/00
CPC分类号： G11B5/84
摘要： A manufacturing method of a tape-form recoding medium in the present invention includes a raw web manufacturing process of forming a data recoding layer on one side of a substrate and a back coat layer having a minute convexity on the other side thereof, and thus manufacturing raw web of the tape-form recoding medium; a raw web winding process of winding the raw web with a predetermined tension; a raw web rewinding process of rewinding the raw web; and a raw web heating process of heating the rewound raw web.
摘要翻译： 本发明的带状记录介质的制造方法包括在基板的一面上形成数据记录层的原纸幅制造工序和在其另一面上具有微小凸起的背涂层，由此制造 带状记录介质的原始网页; 以预定张力卷绕原料纤维网的原料卷绕过程; 将卷筒纸重绕的原料卷筒纸卷绕过程; 以及加热回卷的原料网的原料网加热过程。
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公开(公告)号：US07128989B2
公开(公告)日：2006-10-31
申请号：US10219669
申请日：2002-08-16
CPC分类号： G11B5/714 , G11B5/7021 , G11B5/7023 , G11B5/70678
摘要： Provided is a magnetic recording medium having excellent dispersibility, smoothness and electromagnetic characteristics. The magnetic recording medium comprises at least one magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support. Said ferromagnetic powder is a ferromagnetic metal powder having an average major axis length of 10 to 80 nm and a crystallite size of 8 to 18 nm, or a ferromagnetic hexagonal ferrite powder having an average plate diameter of 5 to 40 nm, and said binder comprises 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM (where M denotes a hydrogen atom, alkali metal or ammonium salt), and/or 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —NR1R2R3+ (where R1, R2 and R3 independently denote hydrogen atoms or alkyl groups).
摘要翻译： 提供了具有优异的分散性，平滑性和电磁特性的磁记录介质。 磁记录介质包括至少一个包含非磁性载体上的铁磁性粉末和粘合剂的磁性层。 所述铁磁粉末是平均长轴长度为10〜80nm，微晶尺寸为8〜18nm的铁磁性金属粉末，平均板直径为5〜40nm的铁磁性六角铁氧体粉末，所述粘合剂包含 0.2〜0.7meq / g的选自-SO 3 M，-OSO 3 M，-PO（OM）2
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公开(公告)号：US20060093869A1
公开(公告)日：2006-05-04
申请号：US11266186
申请日：2005-11-04
IPC分类号： G11B5/716
CPC分类号： G11B5/73 , G11B5/7026 , G11B5/70678 , G11B5/7305
摘要： A magnetic recording medium is provided that comprises a non-magnetic support and, in order above at least one surface thereof, a reinforcing layer comprising at least one material selected from the group consisting of metals, metalloids, and alloys, and oxides and composites thereof, a smoothing layer, and a magnetic layer comprising a ferromagnetic powder dispersed in a binder.
摘要翻译： 提供一种磁记录介质，其包括非磁性载体，并且在其至少一个表面上依次包括选自金属，准金属和合金中的至少一种材料的增强层及其氧化物及其复合材料 平滑层，以及包含分散在粘合剂中的铁磁性粉末的磁性层。
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公开(公告)号：US20050202288A1
公开(公告)日：2005-09-15
申请号：US11037060
申请日：2005-01-19
IPC分类号： G11B5/68
CPC分类号： G11B5/714 , G11B5/7305 , G11B5/733 , Y10T428/31794
摘要： A magnetic recording medium including a polymer support having thereon at least one magnetic layer containing a ferromagnetic metal powder having an average major axis length of from 20 to 100 nm or a ferromagnetic hexagonal ferrite powder having an average tabular diameter of from 5 to 40 nm and a binder, the polymer support having an intrinsic viscosity of from 0.47 to 0.51 dL/g, a Young's modulus in the machine direction of from 7.0 to 8.6 GPa, a Young's modulus in the transverse direction of from 5.4 to 8.0 GPa, and a breaking strength in the transverse direction of from 370 to 450 MPa.
摘要翻译： 一种磁记录介质，包括其上具有至少一个磁性层的聚合物载体，所述磁性层含有平均长轴长度为20至100nm的铁磁性金属粉末或平均片状直径为5至40nm的铁磁性六方铁氧体粉末，以及 粘合剂，特性粘度为0.47〜0.51dL / g的聚合物载体，纵向的杨氏模量为7.0〜8.6GPa，横向的杨氏模量为5.4〜8.0GPa，断裂 横向强度为370〜450MPa。
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公开(公告)号：US06623849B2
公开(公告)日：2003-09-23
申请号：US09866091
申请日：2001-05-25
IPC分类号： G11B5702
CPC分类号： G11B5/70621 , G11B5/7022 , G11B5/7023 , G11B5/70678 , G11B5/733 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/31855
摘要： A magnetic recording medium comprises: a support; an underlayer containing a non-magnetic powder and a binder; and at least one magnetic layer containing a binder and one of a ferromagnetic metal powder having an average major axis of 0.01 &mgr;m to 0.10 &mgr;m and a crystallite size of 80 Å to 180 Å and a ferromagnetic hexagonal ferrite powder having an average tabular diameter of 5 nm to 40 nm, wherein the magnetic layer has a thickness of 0.01 &mgr;m to 0.5 &mgr;m, and the binder in the magnetic layer comprises a (meth)acrylate copolymer having hydrophilic polar groups and comprising 0 to 75% by weight of alkyl (meth)acrylate units, 5 to 80% by weight of benzene ring-containing (meth)acrylate units and 1 to 75% by weight of nitrogen-containing radical polymerizable monomer units.
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公开(公告)号：US6010773A
公开(公告)日：2000-01-04
申请号：US978416
申请日：1997-11-25
CPC分类号： G11B5/7021 , G11B5/7022 , G11B5/716 , G11B5/738 , Y10S428/90 , Y10T428/24975 , Y10T428/265 , Y10T428/31609
摘要： The present invention provides a magnetic recording medium having good electromagnetic transfer characteristics and high running durability, and it comprises a lower layer and a magnetic layer, said lower layer having at least one of magnetic powder or non-magnetic inorganic powder and a binder (A) dispersed therein and being placed on a non-magnetic support member, at least one layer of said magnetic layers having ferromagnetic powder and a binder (B) dispersed therein and being deposited on said lower layer, whereby said magnetic recording medium comprises polyurethane resins (1) and (2), said polyurethane resin (1) is contained as said binder (B) and comprises a short-chain diol having a cyclic structure and weight average molecular weight of 200 to 500 in an amount of 15 to 50 weight %, a polyol having an ether group of 1 to 6 mmol/g and weight average molecular weight of 500 to 5000 in an amount of 10 to 50 weight % in polyurethane, and an organic diisocyanate, and said polyurethane resin (2) is contained as said binder (A) and comprises a short-chain diol having cyclic structure and weight average molecular weight of 200 to 500 in an amount of 0 to 15 weight %, a polyol having an ether group of 6 to 14 mmol/g and weight average molecular weight of 500 to 5000 in an amount of 50 to 90 weight %, and an organic diisocyanate.
摘要翻译： 本发明提供一种具有良好的电磁传递特性和高运行耐久性的磁记录介质，它包括下层和磁性层，所述下层具有至少一种磁粉或非磁性无机粉末和粘合剂（A ）分散在其中并且被放置在非磁性支撑构件上，至少一层所述磁性层具有铁磁粉末和粘合剂（B）分散在其中并沉积在所述下层上，由此所述磁记录介质包括聚氨酯树脂（ 1）和（2）中，作为所述粘合剂（B）含有所述聚氨酯树脂（1），其含有15〜50重量％的环状结构，重均分子量为200〜500的短链二醇 ，聚氨酯中的醚基为1〜6mmol / g，重均分子量为500〜5000的多元醇，有机二异氰酸酯，所述聚氨酯 包含作为所述粘合剂（A）的新型树脂（2），其含有0〜15重量％的环状结构和重均分子量为200〜500的短链二醇，醚基为6的多元醇 至14mmol / g，重量平均分子量为500至5000，数量为50至90重量％，和有机二异氰酸酯。
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公开(公告)号：US20090084880A1
公开(公告)日：2009-04-02
申请号：US12240033
申请日：2008-09-29
申请人： Ren ISHIKAWA , Katsuhiko Meguro
发明人： Ren ISHIKAWA , Katsuhiko Meguro
IPC分类号： G11B23/07 , G11B23/037 , G11B23/027 , B65H75/14 , B65H75/18
CPC分类号： G11B15/32 , B65H75/14 , B65H2401/13 , B65H2701/378 , G11B23/037
摘要： An aspect of the present invention relates to a magnetic tape reel. The magnetic tape reel comprises a hub on which a magnetic tape is wound, and a flange provided on at least one of upper and lower ends of the hub. The flange comprises a surface coating on at least a portion of a surface thereof on the hub side, the surface coating having a hardness equal to or greater than a hardness of an edge surface of the magnetic tape. A further aspect of the present invention relates to a magnetic tape cartridge comprising a magnetic tape and the magnetic tape reel.
摘要翻译： 本发明的一个方面涉及一种磁带卷盘。 磁带卷盘包括一个其上缠绕有磁带的轮毂，以及设置在轮毂的上端和下端中的至少一个上的凸缘。 所述凸缘包括在所述轮毂侧的表面的至少一部分上的表面涂层，所述表面涂层的硬度等于或大于所述磁带的边缘表面的硬度。 本发明的另一方面涉及一种包括磁带和磁带卷盘的磁带盒。
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公开(公告)号：US07485379B2
公开(公告)日：2009-02-03
申请号：US11185676
申请日：2005-07-21
申请人： Satoru Hayakawa , Katsuhiko Meguro
发明人： Satoru Hayakawa , Katsuhiko Meguro
IPC分类号： G11B5/64
CPC分类号： G11B5/735 , G11B5/7026 , G11B5/70678 , G11B5/7305 , G11B5/733 , G11B5/738 , Y10T428/31565
摘要： A magnetic recording medium comprising: a magnetic layer; a first radiation curable resin layer; a non-magnetic support having an intrinsic viscosity of from 0.47 to 0.51 dL/g; and a second radiation curable resin layer, in this order, wherein the first radiation curable resin layer contains a filler, and the second radiation curable resin layer contains a filler.
摘要翻译： 一种磁记录介质，包括：磁性层; 第一辐射固化树脂层; 特性粘度为0.47〜0.51dL / g的非磁性载体; 和第二可辐射固化树脂层，其中第一可辐射固化树脂层含有填料，第二可辐射固化树脂层含有填料。
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公开(公告)号：US20070166571A1
公开(公告)日：2007-07-19
申请号：US11649792
申请日：2007-01-05
CPC分类号： G11B5/714 , G11B5/70 , G11B5/7305
摘要： An aspect of the present invention provides a magnetic recording medium comprising following layers in this order on at least one surface of a nonmagnetic support: a nonmagnetic layer including a nonmagnetic powder and a binder; and a magnetic layer including a magnetic powder and a binder, wherein the nonmagnetic support has an enthalpy relaxation (ΔH) equal to or more than 0.5 J/g and equal to or less than 2.0 J/g. According to the aspect of the present invention, a magnetic recording medium is provided that is superior in electromagnetic conversion (e.g., with a high S/N ratio for surface recording density) and running durability (e.g., with a small number of dropouts and a low error rate).
摘要翻译： 本发明的一个方面提供一种在非磁性载体的至少一个表面上依次包含以下层的磁记录介质：包括非磁性粉末和粘合剂的非磁性层; 以及包含磁性粉末和粘合剂的磁性层，其中所述非磁性载体具有等于或大于0.5J / g且等于或小于2.0J / g的焓弛豫（DeltaH）。 根据本发明的一个方面，提供了一种电磁转换（例如，用于表面记录密度的高S / N比）和运行耐久性优异的磁记录介质（例如，具有少数辍学和 低错误率）。
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